Erlang capacity evaluation of WCDMA systems under co-channel interference with adaptive antenna

Capacity is one of the significant factors in determining the performance of any cellular system. However, the capacity is limited by the interference. In cellular systems, the major source of interference is the Co-Channel Interference(CCI). In this paper, an analytical method is proposed to evaluate the erlang capacity of 3G WCDMA systems under CCI and the performance analysis with the use of adaptive antenna system. In this the probability of CCI is considered for capacity determination. Erlang Capacity results are evaluated using MATLAB^R2013b software with different number of co-channel interferes, adaptive antenna system and power control. The capacity of a WCDMA system can be improved with the use of adaptive antenna for a given probability of CCI. It is observed that the capacity of a WCDMA system is increased from 202.82 Erlangs to 278.22 Erlangs per cell with the proposed method.